WO2018211811A1 - 固体絶縁母線の防水構造、及び固体絶縁母線の接続構造 - Google Patents

固体絶縁母線の防水構造、及び固体絶縁母線の接続構造 Download PDF

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Publication number
WO2018211811A1
WO2018211811A1 PCT/JP2018/010831 JP2018010831W WO2018211811A1 WO 2018211811 A1 WO2018211811 A1 WO 2018211811A1 JP 2018010831 W JP2018010831 W JP 2018010831W WO 2018211811 A1 WO2018211811 A1 WO 2018211811A1
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WO
WIPO (PCT)
Prior art keywords
flange
waterproof
bushing
solid
bus
Prior art date
Application number
PCT/JP2018/010831
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
稔之 沼澤
義和 丹治
近藤　智
田中　康博
Original Assignee
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友電気工業株式会社 filed Critical 住友電気工業株式会社
Priority to CN201880029812.5A priority Critical patent/CN110603698B/zh
Priority to EP18803044.9A priority patent/EP3627643A4/en
Publication of WO2018211811A1 publication Critical patent/WO2018211811A1/ja

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/005—Electrical connection between switchgear cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/013—Sealing means for cable inlets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/027—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of semi-conducting layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings

Definitions

  • the present invention relates to a waterproof structure for a solid insulated bus and a connection structure for a solid insulated bus.
  • Patent Document 1 a busbar connected by combining a rod-shaped conductor and a short stranded wire, a terminal fitting connected to both ends of the busbar, an internal semiconductive layer molded on the busbar and the terminal fitting, an insulating layer, And a mold insulated communication bus comprising an outer semiconductive layer. This mold insulation connecting bus is attached so as to connect the power devices.
  • the waterproof structure of the solid insulated bus is: A solid having a conductor, a terminal connected to an end of the conductor, and a covering portion in which an inner semiconductive layer, an insulating layer, and an outer semiconductive layer are stacked in order from the conductor and the terminal side toward the outside.
  • An insulated busbar A conductor lead bar connected to the terminal;
  • a bushing having a bushing main body that covers the outer periphery of the conductor lead bar, and a bushing flange that protrudes radially outward from the bushing main body;
  • a waterproof portion having a waterproof flange interposed between an end face of the solid insulating bus and the bushing flange.
  • connection structure of the solid insulated bus according to the present disclosure is as follows: A waterproof structure of a solid insulated bus according to the present disclosure; and A counterpart device connected to the solid insulated bus via the conductor lead bar; And a mounting flange interposed between the surface of the bushing flange on the counterpart device side and the counterpart device.
  • the waterproof structure of the solid insulated bus and the connection structure of the solid insulated bus according to the present disclosure described above can prevent water from entering the solid insulated bus.
  • the waterproof structure of the solid insulated bus is A solid having a conductor, a terminal connected to an end of the conductor, and a covering portion in which an inner semiconductive layer, an insulating layer, and an outer semiconductive layer are stacked in order from the conductor and the terminal side toward the outside.
  • An insulated busbar ;
  • a conductor lead bar connected to the terminal;
  • a bushing having a bushing main body that covers the outer periphery of the conductor lead bar, and a bushing flange that protrudes radially outward from the bushing main body;
  • a waterproof portion having a waterproof flange interposed between an end face of the solid insulating bus and the bushing flange.
  • the waterproof flange can prevent water from entering the inside of the solid insulation bus from between the end face of the solid insulation bus and the bushing flange. Therefore, the waterproof structure of the solid insulated bus is a structure necessary for use in an outdoor environment that may be exposed to rainwater.
  • the waterproof portion is formed on a seal member that seals between the waterproof flange and the bushing flange, and a surface on the bushing flange side of the waterproof flange. And a seal groove into which the seal member is fitted.
  • the waterproof effect of the waterproof structure of the solid insulating bus can be enhanced.
  • the outer peripheral portion of the bushing flange may be positioned radially outward of the waterproof flange from the outer peripheral portion of the waterproof flange.
  • the waterproof flange can prevent water from entering the inside of the solid insulation bus bar, and it is difficult for water droplets to stay around the waterproof flange, so that the waterproof effect of the waterproof portion is easily exhibited.
  • the bushing main body includes an insertion region inserted into the solid insulation bus, and an inner peripheral surface of the waterproof flange and an outer periphery of the bushing main body
  • the region formed by the surface includes a press-fitted region in which the covering portion enters and a space region in which the covering portion does not enter.
  • the coating part enters the area formed by the inner peripheral surface of the waterproof flange and the outer peripheral surface of the bushing main body when the insertion area of the bushing main body is inserted (press-fit) into the solid insulation bus. This is because a part of the constituent material is elastically deformed. Due to the elastic deformation of the covering portion, the waterproof flange is firmly fixed to the end face of the solid insulation bus, so that the waterproof effect of the waterproof structure of the solid insulation bus can be enhanced.
  • connection structure of the solid insulation bus according to the embodiment of the present invention is as follows: The waterproof structure of the solid insulation bus according to any one of (1) to (4) above, A counterpart device connected to the solid insulated bus via the conductor lead bar; And a mounting flange interposed between the surface of the bushing flange on the counterpart device side and the counterpart device.
  • connection structure for the solid insulation bus described above, it is possible to waterproof at each end of the solid insulation bus when connecting between power devices via the solid insulation bus, so that the outdoor environment may be exposed to rainwater
  • a connection structure can be constructed below.
  • the said bushing flange is provided with the waterproof side bolt hole opened to the said waterproof flange side, and the attachment side bolt hole opened to the said attachment flange side,
  • the said waterproof The side bolt hole may be positioned more radially outward of the bushing flange than the mounting side bolt hole.
  • the bolts for fixing the waterproof flange to the bushing flange can be provided on the radially outer side of the waterproof flange by the waterproof side bolt hole being positioned radially outward of the bushing flange than the mounting side bolt hole.
  • the outer peripheral portion of the bushing flange is positioned radially outward of the waterproof flange from the outer peripheral portion of the waterproof flange, and the outer peripheral portion of the mounting flange It is mentioned that it is located radially inward of the waterproof flange.
  • a connection structure 100 for a solid insulated bus according to the embodiment includes a gas insulated switchgear (GIS, which is located on the left side of FIG. 1 but not shown) and a transformer (transformer, FIG. 1). It is connected to the right side (not shown) via the solid insulating bus 2.
  • GIS gas insulated switchgear
  • transformer transformer
  • the side close to the GIS in each constituent member is called the GIS side
  • the side close to the transformer is called the transformer side.
  • the waterproof structure 1 of the solid insulation bus will be described, and then the connection structure 100 of the solid insulation bus will be described.
  • the waterproof structure 1 of the solid insulated bus 1 includes a solid insulated bus 2, a conductor lead bar 3 connected to a terminal 21 provided on the solid insulated bus 2, and a bushing 4 provided on the outer periphery of the conductor lead bar 3.
  • the solid insulating bus 2 includes a conductor 20, a terminal 21 connected to the end of the conductor 20, and a covering portion 22 that covers the conductor 20 and the outer periphery of the terminal 21.
  • the bushing 4 includes a bushing main body portion 40 that covers the outer periphery of the conductor lead bar 3 and a bushing flange 42 that protrudes outward in the radial direction from the bushing main body portion 40.
  • the waterproof structure 5 includes a waterproof flange 50 interposed between an end face of the solid insulated bus 2 and a bushing flange 42.
  • the solid insulating bus 2 includes a conductor 20 disposed in the center, a terminal 21 connected to an end of the conductor 20, and a covering portion 22 that covers the conductor 20 and the outer periphery of the terminal 21.
  • a covering portion 22 In the covering portion 22, an internal semiconductive layer 221, an insulating layer 222, and an external semiconductive layer 223 are stacked in this order from the conductor 20 and terminal 21 side toward the outside.
  • Examples of the conductor 20 include a rod-shaped conductor and a composite conductor obtained by combining a rod-shaped conductor and a short stranded wire.
  • the terminal 21 is configured, for example, by attaching a sleeve with the terminal 21 to the end portion of the conductor 20 by compression connection or the like.
  • the inner semiconductive layer 221 and the outer semiconductive layer 223 are made of, for example, a semiconductive rubber material such as semiconductive silicone rubber.
  • the insulating layer 222 is made of an insulating rubber material such as insulating silicone rubber, for example.
  • the solid insulating bus 2 is a molded product obtained by molding a rubber material around the conductor 20 and the terminal 21 using a molding die, for example.
  • the conductor 20 with the terminal 21 is disposed in the first mold, and a semiconductive rubber material is injected between the first mold and the conductor 20 and the terminal 21, so that the conductor 20 and the terminal 21 A first intermediate member having an inner semiconductive layer 221 on the outer periphery is obtained.
  • a first intermediate member is disposed in the second mold, an insulating rubber material is injected between the second mold and the first intermediate member, and an internal semiconducting material is formed on the outer periphery of the conductor 20 and the terminal 21.
  • a second intermediate member having the layer 221 and the insulating layer 222 is obtained. Finally, a second intermediate member is disposed in the third mold, a semiconductive rubber material is injected between the third mold and the second intermediate member, and the inner half of the conductor 20 and the terminal 21 are placed on the outer periphery.
  • a solid insulating bus 2 having a conductive layer 221, an insulating layer 222, and an external semiconductive layer 223 is obtained.
  • the covering portion 22 includes a connection opening 25 connected to one end of the bushing 4.
  • the connection opening 25 is a recess formed by the insulating layer 222 and the external semiconductive layer 223 in the covering portion 22.
  • the terminal 21 is exposed on the bottom surface of the connection opening 25.
  • a bushing main body 40 having a conductor lead bar 3 described later is inserted (press-fitted) into the connection opening 25. Since the terminal 21 is exposed at the bottom surface of the connection opening 25, the bushing body 40 is inserted into the connection opening 25, so that the terminal 21 and the conductor lead bar 3 are formed inside the connection opening 25. And are connected.
  • the inner peripheral surface of the connection opening 25 is composed of a truncated cone-shaped inclined surface that tapers from the opening side toward the bottom surface side.
  • the shape of the GIS side end 2G and the shape of the transformer side end 2T of the solid insulating bus 2 are different.
  • the transformer side end 2T (the right side in FIG. 1) is provided with a covering portion 22 along the longitudinal direction of the conductor 20, and a connection opening 25 is opened coaxially with an extension line in the longitudinal direction of the conductor 20. ing.
  • the thickness of the covering portion 22 is thicker than the central portion of the solid insulating bus 2, and the outer diameter is larger than the central portion of the solid insulating bus 2.
  • the insulating layer 222 and the external semiconductive layer 223 of the covering portion 22 extend from the GIS side end portion 2G (left side in FIG.
  • connection opening 25 is opened in a direction intersecting (orthogonal) with the longitudinal direction of the conductor 20.
  • the GIS side end 2G has a working opening 26 opened on the side opposite to the connection opening 25 in a direction intersecting (orthogonal) with the longitudinal direction of the conductor 20.
  • the working opening 26 is a recess formed by the insulating layer 222 and the external semiconductive layer 223 in the covering portion 22.
  • the inner peripheral surface of the working opening 26 is also configured by a truncated cone-shaped inclined surface that tapers from the opening side toward the bottom surface side.
  • the conductor lead bar 3 has one end connected to the terminal 21 of the solid insulation bus 2 and the other end connected to a lead conductor (not shown) of the counterpart device (GIS or transformer).
  • the terminal 21 and the lead conductor of the counterpart device are electrically connected to each other at the GIS side end 2G and the transformer side end 2T of the solid insulation bus 2 via the conductor lead bar 3, so that the solid insulation bus 2
  • the GIS and the transformer are electrically connected via each other.
  • the terminal 21 of the transformer side end 2T of the solid insulated bus 2 and the conductor lead bar 3 are connected by inserting the terminal 21 into the insertion hole formed at the terminal 21 side end of the conductor lead bar 3. , Press contact connection. Further, the connection between the terminal 21 of the GIS side end 2G of the solid insulated bus 2 and the conductor lead bar 3 is carried out by attaching a plate-like connecting part 210 to the terminal 21, and the surface of this connecting part 210 and the end face of the conductor lead bar 3 Are connected and fixed with bolts 211.
  • the work opening 26 of the solid insulating bus 2 is provided for fastening the bolt 211.
  • the bushing 4 includes a bushing main body portion 40 that covers the outer periphery of the conductor lead bar 3 and a bushing flange 42 that protrudes outward in the radial direction from the bushing main body portion 40.
  • the bushing main body 40 and the bushing flange 42 are integrally molded products.
  • the bushing 4 is made of, for example, an epoxy resin.
  • the bushing main body 40 is a cylindrical member that includes an insertion hole 40h that passes through one end and the other end in the longitudinal direction and through which the conductor lead bar 3 is inserted. Inside the bushing main body 40, the conductor lead bar 3 is integrally formed. That is, the bushing main body 40 (the bushing 4 including the bushing flange 42) and the conductor lead bar 3 are obtained by molding the constituent material of the bushing 4 on the outer periphery of the conductor lead bar 3 using a molding die. It is a molded product.
  • the bushing main body 40 includes an insertion region that is inserted into the connection opening 25 of the solid insulating bus 2.
  • the outer peripheral surface of the insertion region of the bushing main body portion 40 is formed by a truncated cone-shaped inclined surface that tapers toward the end portion along the inner peripheral surface of the connection opening 25.
  • the outer diameter of the insertion region of the bushing main body 40 is slightly larger than the inner diameter of the connection opening 25. Therefore, when the insertion region of the bushing main body 40 is inserted (press-fitted) into the connection opening 25, the insertion region of the bushing main body 40 is fixed in the connection opening 25 in a press-contact state.
  • the shape of the bushing main body 40 is different between the GIS side bushing 4G and the transformer side bushing 4T.
  • the transformer-side bushing 4T has a region opposite to the insertion region across the bushing flange 42 longer than a corresponding region in the GIS-side bushing 4G, and has a plurality of flanges on the outer periphery thereof. The creepage distance is secured by the buttocks.
  • the bushing flange 42 is a plate-like member protruding outward in the radial direction of the bushing main body 40 in the middle of the bushing main body 40 in the longitudinal direction.
  • the bushing flange 42 is provided over the entire circumference of the bushing main body 40 in the circumferential direction.
  • the bushing flange 42 is provided in an annular shape.
  • the bushing flange 42 protrudes so that the outer peripheral portion thereof is positioned radially outward of the solid insulating bus 2 from the end surface of the solid insulating bus 2 (end surface of the connection opening 25). Further, the bushing flange 42 protrudes so that the outer peripheral portion thereof is positioned radially outward of the waterproof flange 50 from the outer peripheral portion of the waterproof flange 50 described later.
  • the bushing flange 42 includes bolt holes 42a and 42b on the front and back surfaces, respectively.
  • the bolt hole 42 a is a recess that opens to the waterproof flange 50 side, which will be described later, and a bolt 54 that fixes the waterproof flange 50 is screwed into the bushing flange 42.
  • the bolt hole 42b is a recess that opens to the mounting flange 120 side described later, and a bolt 124 that fixes the mounting flange 120 to the bushing flange 42 is screwed into the bolt hole 42b.
  • Embedded electrodes 42ae and 42be are embedded in the inner surfaces of the bolt holes 42a and 42b, respectively.
  • the waterproof-side bolt hole 42a that opens to the waterproof flange 50 side is located radially outward of the bushing flange 42 relative to the mounting-side bolt hole 42b that opens to the mounting flange 120 side. Further, the waterproof-side bolt hole 42a and the mounting-side bolt hole 42b overlap each other at the tip end portions of the bolt holes 42a and 42b when seen in the circumferential direction of the bushing flange 42.
  • the bolt holes 42a and 42b are provided in the bushing flange 42 equally in the circumferential direction. Depending on the dimensions of the bolt holes 42a and 42b and the thickness of the bushing flange 42, there may be cases where the bolt holes 42a and 42b are displaced from each other in the circumferential direction.
  • the waterproof part 5 includes a waterproof flange 50 interposed between the end face of the solid insulating bus 2 (the end face of the connection opening 25) and the bushing flange 42.
  • the waterproof portion 5 includes a seal member 52 that seals between the waterproof flange 50 and the bushing flange 42, and a seal groove 51 that is formed on the surface of the waterproof flange 50 on the bushing flange 42 side.
  • the waterproof flange 50 is an annular member.
  • the waterproof flange 50 when the waterproof flange 50 is attached to the bushing flange 42, the waterproof flange 50 is located on the outer periphery of the bushing main body 40, and a space region (the space region 8b shown in FIG. It is an annular member having an inner peripheral surface forming a part thereof.
  • the outer peripheral portion of the waterproof flange 50 is located radially inward of the bushing flange 42 with respect to the outer peripheral portion of the bushing flange 42.
  • the waterproof flange 50 is made of, for example, brass (Cu—Zn alloy).
  • the waterproof flange 50 includes a concave seal groove 51 formed on the surface on the bushing flange 42 side.
  • the seal groove 51 is formed in an annular shape along the outer shape of the waterproof flange 50.
  • a seal member 52 is fitted into the seal groove 51.
  • the seal member 52 is, for example, a nitrile rubber O-ring.
  • the width and depth of the seal groove 51 can be appropriately selected as long as the seal member 52 can be fitted and the gap between the waterproof flange 50 and the bushing flange 42 can be sealed by the seal member 52.
  • the waterproof flange 50 includes a through hole 53 that penetrates the front and back surfaces.
  • a bolt 54 for fixing the waterproof flange 50 to the bushing flange 42 passes through the through hole 53.
  • the through hole 53 is located outward of the seal flange 51 in the radial direction of the waterproof flange 50.
  • the surface on the bushing flange 42 side of the waterproof flange 50 is in contact with the surface of the bushing flange 42 over the entire surface.
  • the surface of the waterproof flange 50 on the solid insulation bus 2 (connection opening 25) side is in contact with the end surface of the solid insulation bus 2 (end surface of the connection opening 25) on the inner side, and the solid insulation bus is on the outer side.
  • the waterproof flange 50 can be easily fixed to the bushing flange 42 with the bolt 54, and the head of the bolt 54 is solid with the waterproof flange 50. It is possible to prevent the contact with the end face of the insulating bus 2 from getting in the way.
  • the waterproof flange 50 is fixed to the bushing flange 42 with bolts 54 and fixed to the solid insulating bus 2 by pressure contact. Specifically, the waterproof flange 50 is fixed to the bushing flange 42 by passing the bolt 54 through the through hole 53 of the waterproof flange 50 and screwing the bolt 54 into the bolt hole 42 a of the bushing flange 42.
  • the bushing 4 in which the waterproof flange 50 is fixed to the bushing flange 42 inserts (press-fits) the insertion region of the bushing main body portion 40 into the connection opening portion 25, so that the insertion region of the bushing main body portion 40 becomes the connection opening portion 25.
  • the waterproof flange 50 is fixed to the end face of the solid insulating bus 2 (the end face of the connection opening 25) in a press-contact state.
  • the inner peripheral surface of the waterproof flange 50 and the outer peripheral surface of the bushing main body 40 are The region to be formed includes a press-fitted region 8a in which the covering portion 22 enters, and a space region 8b in which the covering portion 22 does not enter.
  • the covering portion 22 enters the region formed by the inner peripheral surface of the waterproof flange 50 and the outer peripheral surface of the bushing main body portion 40 when the insertion region of the bushing main body portion 40 is inserted into the connection opening 25.
  • the outer diameter of the insertion region 40 is slightly larger than the inner diameter of the connection opening 25, so that part of the constituent material of the covering portion 22 is elastically deformed during the insertion. Due to the elastic deformation of the covering portion 22, the waterproof flange 50 is fixed to the end surface of the solid insulating bus 2 (the end surface of the connection opening 25) in a pressure contact state.
  • a working flange 26 formed on the GIS side end 2G of the solid insulating bus 2 is attached with a sealing flange 6 having an insulating plug 7.
  • the insulating plug 7 is made of, for example, an epoxy resin
  • the sealing flange 6 is made of, for example, brass.
  • the insulating plug 7 has a frustoconical inclined surface whose outer peripheral surface is along the inner peripheral surface of the working opening 26 and tapers from one end to the other end.
  • the outer diameter of the insulating plug 7 is slightly larger than the inner diameter of the working opening 26. Therefore, when the insulating plug 7 is inserted (press-fitted) into the working opening 26, the insulating plug 7 is fixed in the working opening 26 in a press-contact state.
  • Embedded electrodes 71 and 72 are embedded in the insulating plug 7 in the vicinity of the bolt 211 that connects the connecting portion 210 attached to the terminal 21 and the conductor lead bar 3 and in the vicinity of the fixture to the sealing flange 6. ing.
  • a waterproof flange 55 is interposed between the sealing flange 6 and the end face of the solid insulating bus 2 (end face of the working opening 26).
  • the waterproof flange 55 has the same configuration as the waterproof flange 50 interposed between the end surface of the solid insulating bus 2 (the end surface of the connection opening 25) and the bushing flange 42.
  • connection structure 100 of the solid insulation bus connects the GIS and the transformer via the solid insulation bus 2, and is connected to the above-described waterproof structure 1 of the solid insulation bus and the solid insulation bus 2 via the conductor lead bar 3.
  • a counterpart device 110 GIS or transformer to be connected and a mounting flange 120 are provided.
  • the counterpart device 110 is a GIS or a transformer, and includes a connection target (such as a lead conductor) 112 connected to the solid insulating bus 2 via the conductor lead bar 3 and a housing 114 that accommodates the connection target 112.
  • a connection target such as a lead conductor
  • the housing 114 accommodates the connection target 112.
  • a region opposite to the insertion region across the bushing flange 42 is accommodated in the housing 114, and the conductor lead bar 3 and the connection object 112 are connected in the housing 114.
  • the mounting flange 120 is interposed between the surface on the counterpart device side of the bushing flange 42 and the housing 114 of the counterpart device.
  • the mounting flange 120 is an annular member.
  • the outer peripheral portion of the mounting flange 120 is positioned radially outward of the bushing flange 42 from the outer peripheral portion of the bushing flange 42.
  • the mounting flange 120 is made of brass, for example.
  • the mounting flange 120 includes a concave seal groove 121a formed on the surface on the bushing flange 42 side, and a concave seal groove 121b formed on the surface on the counterpart device side.
  • the seal grooves 121 a and 121 b are provided at positions overlapping in the thickness direction of the mounting flange 120, and are formed in an annular shape along the outer shape of the bushing flange 42.
  • a seal member 122a that seals between the mounting flange 120 and the bushing flange 42 is fitted in the seal groove 121a, and a seal that seals between the mounting flange 120 and the counterpart device (housing 114) is inserted in the seal groove 121b.
  • the member 122b is fitted.
  • the seal members 122a and 122b are, for example, nitrile rubber O-rings.
  • the mounting flange 120 includes a through hole 123 that penetrates the front and back surfaces.
  • a bolt 124 that fixes the mounting flange 120 to the bushing flange 42 passes through the through-hole 123.
  • the through-hole 123 is formed so that the head of the bolt 124 is positioned on the inner side of the surface of the mounting flange 120 in a state where the mounting flange 120 is fixed to the bushing flange 42. Therefore, in a state where the mounting flange 120 is fixed to the bushing flange 42, the surface of the mounting flange 120 is in contact with the outer surface of the housing 114 over the entire surface.
  • the through-hole 123 is located radially inward of the mounting flange 120 with respect to the seal grooves 121a and 121b.
  • the above-described waterproof structure 1 for the solid insulated bus is configured so that the interior of the solid insulated bus 2 is provided between the end face of the solid insulated bus 2 (the end face of the connection opening 25) and the bushing flange 42 by the waterproof flange 50 of the waterproof part 5. It is possible to prevent water from entering the water. Further, the waterproof flange 55 prevents water from entering the inside of the solid insulation bus 2 from between the end face of the opening formed in the covering portion 22 (the end face of the working opening 26) and the sealing flange 6. it can. Therefore, the waterproof structure 1 for the solid insulated bus can be used even in an environment exposed to rainwater such as outdoors.
  • the solid insulation busbar connection structure 100 can be constructed in an outdoor environment that may be exposed to rainwater.
  • the outer peripheral portion of the waterproof flange 50 is located radially inward of the bushing flange 42 with respect to the outer peripheral portion of the bushing flange 42, water applied to the bushing flange 42 can be guided to the waterproof flange 50 side. . Further, since the outer peripheral portion of the bushing flange 42 is located radially inward of the mounting flange 120 with respect to the outer peripheral portion of the mounting flange 120, water applied to the mounting flange 120 is waterproofed via the bushing flange 42. It can guide to the flange 50 side. Since waterproofing can be performed by the waterproof flange 50 and water droplets are unlikely to stay around the waterproof flange 50, the waterproof effect of the waterproof portion 5 is easily exhibited.
  • the waterproof flange 50 and the mounting flange 120 are fixed to the bushing flange 42 by bolts 54 and 124, respectively, and bolt holes 42a and 42b into which the bolts 54 and 124 are screwed are formed on the front and back surfaces of the bushing flange 42, respectively. Since the bolt hole 42a on the waterproof flange 50 side is positioned outward from the bolt hole 42b on the mounting flange 120 side, the bolt 54 can be disposed outward from the seal member 52, and the waterproof flange 50 is fixed to the bushing flange 42. The waterproof flange 50 and the end face of the solid insulating bus 2 can be pressed against each other, and the sealing performance between the two 50 and 42 can be effectively ensured.
  • seal member 52 can be disposed on the opposite surface facing the bolt hole 42b, and the seal member 122a can be disposed on the opposite surface facing the bolt hole 42a.
  • the increase in direction can be suppressed, and the sealing performance between each member can be effectively secured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulated Conductors (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Cable Accessories (AREA)
PCT/JP2018/010831 2017-05-15 2018-03-19 固体絶縁母線の防水構造、及び固体絶縁母線の接続構造 WO2018211811A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880029812.5A CN110603698B (zh) 2017-05-15 2018-03-19 用于固体绝缘母线的防水结构以及用于固体绝缘母线的连接结构
EP18803044.9A EP3627643A4 (en) 2017-05-15 2018-03-19 WATERPROOF STRUCTURE FOR A FIXED INSULATION BUS AND CONNECTING STRUCTURE FOR A FIXED INSULATION BUS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-096863 2017-05-15
JP2017096863A JP6814092B2 (ja) 2017-05-15 2017-05-15 固体絶縁母線の防水構造、及び固体絶縁母線の接続構造

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CN113161877A (zh) * 2021-03-15 2021-07-23 深圳供电局有限公司 法兰防雨装置

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US11502498B2 (en) 2019-06-07 2022-11-15 Nkt Hv Cables Ab Power cable termination system

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JP2017096863A (ja) 2015-11-27 2017-06-01 国立研究開発法人産業技術総合研究所 構造物の亀裂発生検出システム及びそれに用いるひずみセンサ

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CN113161877A (zh) * 2021-03-15 2021-07-23 深圳供电局有限公司 法兰防雨装置
CN113161877B (zh) * 2021-03-15 2023-03-03 深圳供电局有限公司 法兰防雨装置

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Publication number Publication date
JP2018195410A (ja) 2018-12-06
JP6814092B2 (ja) 2021-01-13
CN110603698A (zh) 2019-12-20
EP3627643A1 (en) 2020-03-25
EP3627643A4 (en) 2021-02-24
CN110603698B (zh) 2020-11-13

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